Add one tsc verify or similar

[alecmev]

useProjectReferences is great, but we also want to check if everything is correct in a lint task and in CI, and currently there's no way to do that without potentially writing to disk.

Alternatively, instead of tsc verify, an option allowing the plugin to write could be added (defaulting to false).

[paularmstrong]

We might want to think about this a little more holistically across commands that do similar things. A standard flag may be better, eg --no-fix, analogous to the opposite of eslint's --fix or a global --ci flag. Prettier also has a --check flag. It would be good to make the flags the same across all commands to avoid confusion.